Device for lifting plate-glass



(No Model.)

3 SheetsSheet 1. W. S. JARBOE.

DEVICE FOR LIPTING PLATE GLASS. 4

No. 438,584. Patented Oct. 14,1890.

(No Model.) 3 Sheets-Sheet 3. W. S. JARBOE.

DEVICE FOR LIPTING PLATE GLASS,

Patented Oct 14, 1890 i it INVENTOR a wwl/w UNITED STATES PATENT OFFICE.

WALTER S. JARBOE, OF ALLEGHENY, ASSIGNOR TO GEORGE W. SIMONDS, OF PITTSBURG, PENNSYLVANIA.

DEVICE FOR LIFTING PLATE-GLASS.

SPECIFICATION forming part of Letters Patent No. 438,584, dated October 14, 1890.

Application filed May 5,1890. SerialNo. 350M 0 model To all whom it may concern.-

Be it known that I, WALTER S. J ARBOE, a citizen of the United States, residing at Allegheny, county of Allegheny, and Stateof Pennsylv-ania, have invented a new and useful Plate-Glass-Lifting Device, of which the following is a specification.

Myinvention consists in the hereinafter described and claimed device for lifting plateglass and the object of it is to afford a means for more safely and efficiently lifting and transporting large sheets of plate-glass or similar material.

In the accompanying drawings, Figure l is a plan view of myinvention. Fig.2 is a section of same on line I 1, showing, however, only the middle rib of the frame with the suction-disks thereto to be attached and the center casting. Fig. 3 is an enlarged sectional View of center casting and surrounding parts. Fig. 4 is a partial plan of Fig. 3. Fig. 5 is a detail of the suction-disk, partly in section. Fig. 6 is a section of Fig. 5 on the line II II. Fig. '7 is a detail of the valve of the suctiondisk. Fig.8 is a perspective view of detachable hook 21.

The frame 10f myinvention is constructed of a central steel casting 2, in which are inserted ribs of plate metal 3, having their ends joined by plates 4, thus forming a rectangular frame having a hub.

The casting 2 is made with a hub 2, Fig. 3, and radiating spokes 2 each of which has a recess to form a socket to take the ends of ribs 3 of the frame 1. Spokes 2 are strengthened'and re-enforced by circular plates 2 which are caston the upper and under sides of said casting 2. On the upper side are cast two lugs 2 each of which is bored to take pin 6 of bar 5. Said casting is also provided with a hole 2 at its center, for a purpose hereinafter described.

To each of the spokes 2 a lug 2 is cast and provided with a hole for the reception of shafts 8.

A bar 5, forked at one end with forks drilled for the reception of pins 6 and at the other end having an eye 5, is attached to casting 2 by inserting pins 6 through the holes in its forks and in lugs 2 of the casting 2. Near the eye 5' is a hole 5 having lugs 5 on each side. Mounted on lugs 5 is a latch 5 having a hook at one end.

A keeper 5 for latch 5 made of plate metal, is fastened to plate 4 in such position that the latch 5 will be engaged and held thereby.

' Bar 5 has a swivel-joint at 5 by which the frame when suspended may be turned in any desired direction.

In hole 2 of casting 2 a shaft 7 is placed in such manner as to revolve freely therein. At its upper end a handle or lever 7 is fixed, and at its lower end a bevel-wheel 7' in such position that the bevel-pinions 7 on shafts 8 will engage the same.

The suction-disks affixed to the frame 1 in the manner and number shown, or in any convenient manner, are constructed as follows: A casting 9 is cast solid, having a flat head with, a cylindrical projection from one side. The head has a slot 10 milled into it of suffi cient size to fit closelyon ribs 3, to which the castings are bolted by bolts 11. In the cy lindrical projection of the casting a hole 12 is bored, which is threaded at its opening. It is also bored transversely through lugs 9, making hole 13 therein. A small hole 9 is bored in 9. In hole 12 is first placed a spiral spring 14, then a cylinder of metal 15, preferably a piece of cold-rolled shafting, which has a hole 15 bored therein. At its lower end a small dovetailed opening '16 is placed, into which a piece of india-rubber 17 is forced. A metal disk 18, having a threaded lug 18' is fitted in hole 12, the disk 18 having a small hole 18 drilled therein. An india-rubber cup 19, having a hole of such size as to admit of the passage of lug 18 is made in the shape shown on the drawings. A cup-shaped disk 20 is made with a hole, which is threaded to receive lug 18' of disk 18. The cup 19 is placed over lug 18 of disk 18, and disk 20 is then screwed down on lug 19 until the face of disk 18 is in the same plane as the edges of the flange of 20, so that when the rubber cup is extended by pressure or otherwise the edges of cup 19 will form an air cushion-under the edges of the flange of disk 20.

Shaft 8 is made of cold-rolled shafting, and

is placed-througlrthe openings 13 of the castings 9 and the opening of lug 2 'of casting 2, these openings forming the bearings therefor. The beveled pinion 7 is fixed to shaft 8, so as to be meshed in bevel-wheel 7 At those points on shaft 8 Where it encounters cylinders 15 in the castings 9 it is turned-s0 as to form a crank-pin 8', so that when the shaft revolves cylinders 15 Will be depressed by action of spring 14 and raised on 8' being turned to top position.

Hook 21 is made with a hooked shank 22, having jaws 23, which permit of its being placed over rib 3 of the frame and clamped thereon by thumb-screw 24. In the bottom of thehook a piece of wood 25 is-placedto form a cushion.

To use myinvention, the same should be suspended overtheplateof material'to'be li'fted and transported. The 1ever'7' should be operated so-that'the revolution of bevel-wheel '7 will cause the pinions '7 'meshing init'to ,plate to 'be raised and its weight will distendj the=rubber'cups 19 and drive all of the air outfrom between'them and the'plate to 'be lifted. When the frame has firmlyi'settledj down, the lever 7 is again operated, sothat in the mannerabove described shafts 8 will' revolve and leave cylinders 15 "free'to def scend,"whichthey are compelledto do by the action of spring 14. Cylinders 15 having thus been gpressed downfthe 'india rubberj cushion 16 stops ith'e hole or air-passage in' 1 disk '18 andpreservesthe vacuuin'formedbyf the expulsion of the air from between cups 20'andplate of material to. be lifted. Avacuum'beingthus formed at the points'where cups .19 come in contact with plate to be lifteda'firm grip is taken. upon thesame}; which will allow thejplate to be-raised and suspended.

The bar5 is bymeans of its eye attached to means'suspending the frame,. and, when desired,'the.plate liftedmaybe'filted' from the horizontal plane from which it isfirst'lifted. to aplane at a slight'angle from'the vertical.

\Vhen'the device is to be loosened'fromthej plateto which ithas been attached, thclever;

7 is:a "aino erated so as to own the air-j a 1 passage in disk 1S, when, the air entering the same, the vacuum is destroyed and the hold of the device broken, and the same is easily taken away from the plate. Hook 21 supports plate lifted by frame. Among the advantages which may be claimed for my invention the following are materialfthe combination-of a frame having vacuum disks, with a bar 'liinged to said frame, and having a springwlatch to engage and hold said frame, substantiallyas andfor thepurposes described.

2. Ina deviceforlifting sheets of "fragile mate rial, lthe'combination of a .frame having a hub, ribs radiating therefrom, vacuumdisks attached to saidribs, shafts parallel to said ribs and supported by said hubs-and vacuum-disks, and the meansforsimultaneously revolving said shafts; substantially as and forthepurposes described.

3. .Inza-devicefor lifting sheets of "fragile material, theconibination o'f a framcrhaving a hub, and ribs radiating" therefromwacuu n1- disks'attache'd to said'ribs,-'shaftsparallchto said ribs "and supported by'sai'd hub'and Vacuum-disks, and each havingra beveled pinion meshing "into 'a'beveled gear-wheel mounted on 'said =hnb,';substanti'allyqas 'and for the purposes described.

4. Avacuum-diskhaving "a cylinderbpen at one end, and an air-passage,"a cmovable plunger: having a pad at its" lower end, afiexible suction-cup snpported'l'bys suitable disks, one of Whichhas'an air-passage communicating with said cylinder, in com bination'with a shaft passing through said plunger eccentricallywiththeperforation in the same, said cylinder forming bearings for said shaft, substantially asand for the'purposes' described.

WALTER S. JARBOE. 'XVitnesses:

R0131. S. FRAZER, 'J'AMES'W. PRESCOTT. 

